Kyoujurou Rengoku

He is greatly enthusiastic in regard to his duties as Flame Pillar and often cheerfully eccentric. He is amiable kind and boasts extraordinary fire techniques and swordsmanship stemming from strict practice and discipline. He is an honourable warrior who adheres to his code of morals and principles that was instilled into him by his mother at a young age the most significant being that those who were born strong have a duty to protect the weak.Source: Kimetsu no Yaiba Wiki